I must say in all but its not like im saying im a pro, its just because all the Castlevania plays similar to the other or most, for me all the olds Castlevania have the same rules so its easy to know what to do and dont do and the same goes for the new or metroidvanias, and when some game its easy to play i like to make chalenge for example fight with the headhunter in AoS but with low level and with the inicial weapons, it was hard but after a lot of try i manage to do that, the same goes for the zombie dragon in CotM i 1st think it was impossible to beat in low level but i make it.
Perhaps the game i have more trouble its the 3D games but for the sidescroll castlevania im good in all or at least is hard to say in which im most skilled, i think its better to ask a friend that see me playing that games.